Padlock base



FIG. 1 is a top, front, left side perspective view of a padlock base;

FIG. 2 is a front elevation view of FIG. 1;

FIG. 3 is a rear elevation view of FIG. 1;

FIG. 4 is a left side elevation view of FIG. 1;

FIG. 5 is a right side elevation view of FIG. 1;

FIG. 6 is a top plan view of FIG. 1; and,

FIG. 7 is a bottom plan view of FIG. 1.

The dash-dash broken lines show portions of the exit device that form no part of the claimed design. The dot-dash broken lines represent boundaries of the claimed design and form no part of the claimed design. Any broken line illustration of environmental structure in the drawing is not part of the design sought to be patented. The solid black surface shading is used to represent the color black or color contrast. 

CLAIM The ornamental design for a padlock base, as shown and described. 